got a server in the office with ubuntu installed, which i cannot recreate (since it has a custom kernel and modules).This is instaled in old school raid cards, i wish to move this onto proxmox so it can play well with everything else and we are not in the risk of the raid card/server dying.

My plan is to go to clonezilla, clone the partition to an image and then put it in proxmox. i wish to clone only the main booteable partition, i dont care about other partitions with software as we already moved them onto docker containers. i would just clone the entire raid but it's like 20tb and i only care about the 100gb partition with the booteable partition.
Should this work out?